To "Protect and Serve". Seems like that is written on the side of the squad cars around here. Who pays them? Tax payers. Once they determined that Don and Sons were not suspects, then Don & Sons became their employers, in part at least. At that point Don & Sons deserved to be treated with respect. It goes both ways.
And no Sgt., Don & Sons didn't feel they could speak their minds in America the Wonderful, to these two guys because they didn't want any future trouble. If the law biding public fears intimidation and reprisals then something is broken. Maybe "Charm School" should be part of the Police Academy coursework.
In my 70 plus years I have only encountered one police officer that behaved like a jerk. (And in court I proved it was an unjust ticket and won). Police officers have helped me even when I didn't deserve it. I am very appreciative of good officers. I have been on a couple ride-alongs and was impressed with the professionalism. But, just like teachers it seems too difficult for departments to correct bad behavior or fire individuals that aren't suited for the job.